Alisson and Thiago face fitness tests ahead of their encounter with Arsenal at home.
New Reds signing Thiago Alcantara and first-choice goalkeeper Alisson are major doubts for Monday night’s clash against Arsenal.
Alisson suffered hip and calf problems last season that made him unavailable for 14 matches.
Thiago is still expected to make his full debut after an influential cameo in the 2-0 victory over Chelsea at Stamford Bridge.
The duo have missed a number of training sessions with the nature and extent of their issues still unknown.
The Reds already have a number of injuries in the squad with the likes of captain Jordan Henderson and Joel Matip, both recovering from muscle problems and Alex Oxlade-Chamberlain.
On the positive side, Joe Gomez is set to play alongside Virgil Van Dijk who returned to training on Friday and Fabinho will return to his natural midfield position.
Klopp provided a fitness update on Friday and said: ‘I think Joe should be back today in training, that’s what everybody told me – and nobody told me something different since.
‘Billy [Koumetio] is back in training. Joel not, pretty much. Hendo not yet, that was clear – this game is for sure too early. I think that’s it, pretty much.’